ขนาด
inch

วงนอก
mm

น้ำหนัก kg

1.2 mm

1.4 mm

1.6 mm

1.8 mm

2.0 mm

2.3 mm

2.6 mm

2.8 mm

1/2

21.7

3.5

4.0

4.6

5.2

5.8

6.6

7.3

7.6

3/4

27.2

4.3

5.0

5.8

6.5

7.3

8.3

9.4

10

1

34.0

5.5

6.4

7.3

8.3

9.0

10.5

12.0

12.8

1 1/4

42.7

7.0

8.3

9.5

10.6

12

13.5

15

16.5

1 1/2

48.6

8.0

9.5

10.8

12

14

16

18

19

2

60.5

10.4

12

13.8

15.6

17.3

20

22.5

24.2

2 1/2

76.3

-

15.3

17.5

20

22

25

28

30.5

3

89.0

-

18

21

23

26

30

34

36

3 1/2

101.6

-

-

23

26

29

33

37

40

4

114.3

-

-

27

30

33

38

44

47

5

139.8

-

-

-

-

40

45

52

56

6

165.2

-

-

-

-

48

55

63

68

8

316.9

-

-

-

-

61

71

81

88